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Note 10 - Debt and Commitments (Details Textual)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Apr. 30, 2022
USD ($)
a
Nov. 30, 2015
USD ($)
ft²
a
Jun. 30, 2022
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2013
USD ($)
Sep. 30, 2021
USD ($)
Oct. 31, 2020
Investment Margin Account     $ 75,000,000 $ 75,000,000     $ 32,000,000  
Payments to Acquire Property, Plant, and Equipment, Total     11,000 14,000 $ 29,000      
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                
Area of Real Estate Property (Square Foot) | a 17,564              
Proceeds from Sale of Land Held-for-use $ 381,000              
UTAH | Building [Member]                
Area of Real Estate Property (Square Foot) | ft²   30,700            
UTAH | Land [Member]                
Area of Land (Acre) | a   3.6            
Payments to Acquire Property, Plant, and Equipment, Total   $ 1,240,000            
Margin Account [Member]                
Proceeds from Issuance of Debt       45,500,000   $ 29,500,000    
Investment Margin Account     $ 75,000,000 $ 75,000,000        
Debt Instrument, Interest Rate, Effective Percentage     2.25% 2.25%        
Margin Account [Member] | Fed Funds Rate [Member]                
Debt Instrument, Basis Spread on Variable Rate           0.50%    
Real Estate Bank Loan Secured by Logan Office [Member]                
Loans Payable to Bank, Total   $ 2,260,000 $ 1,470,000 $ 1,470,000        
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate   4.66%           3.33%
Long-term Debt, Term (Year)               10 years
Debt Instrument, Periodic Payment, Total       $ 16,600